2143055557 has 2 divisors, whose sum is σ = 2143055558. Its totient is φ = 2143055556.

The previous prime is 2143055549. The next prime is 2143055573. The reversal of 2143055557 is 7555503412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1093360356 + 1049695201 = 33066^2 + 32399^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143055557 - 2³ = 2143055549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143055507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071527778 + 1071527779.

It is an arithmetic number, because the mean of its divisors is an integer number (1071527779).

Almost surely, 2^2143055557 is an apocalyptic number.

It is an amenable number.

2143055557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143055557 is an equidigital number, since it uses as much as digits as its factorization.

2143055557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 2143055557 is about 46293.1480567049. The cubic root of 2143055557 is about 1289.2717795617.

Adding to 2143055557 its reverse (7555503412), we get a palindrome (9698558969).

The spelling of 2143055557 in words is "two billion, one hundred forty-three million, fifty-five thousand, five hundred fifty-seven".